<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 提示区域 -->
            <el-alert
            title="消息提示的文案"
            type="info"
            center
            show-icon
            closable="false">
            </el-alert>
            <!-- 步骤条区域 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm" label-position="top">
                <el-tabs :tab-position="'left'" style="height: 200px;" v-model="activeIndex" :before-leave="beforeTabLeave" @click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                            v-model="value"
                            :options="catelist"
                            :props="cateProp"
                            expand-trigger = "hover"
                            @change="handleChange">
                            </el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 渲染表单的item属性 -->
                        <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">
                            <!-- 复选框组 -->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- action表示图片要上传到的后台API地址 -->
                        <el-upload
                        action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        :file-list="fileList"
                        list-type="picture"
                        :headers="headerObj"
                        :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器 -->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <!-- 添加商品的按钮 -->
                        <el-button type="primary" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>

        </el-card>

        <!-- 图片预览 -->
        <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
            <img src="previewPath" alt="">
        </el-dialog>


    </div>
</template>

<script>
import _ from 'lodash'



export default {
    data(){
        return{
            activeIndex:'0',
            //添加商品的表单数据对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品所属的分类数组、
                goods_cat:[],
                //图片的数组
                pics:[],
                //商品的详情描述
                goods_introduce:'',
                attrs:[]
            },
            //
            addFormRules:{
                goods_name:[
                    {required:true,message:'请输入商品名称',trigger:'blur'}
                ],
                goods_price:[
                    {required:true,message:'请输入商品价格',trigger:'blur'}
                ],
                goods_weight:[
                    {required:true,message:'请输入商品重量',trigger:'blur'}
                ],
                goods_number:[
                    {required:true,message:'请输入商品数量',trigger:'blur'}
                ],
                goods_cat:[
                    {required:true,message:'请选择商品分类',trigger:'blur'}
                ]
            },
            // 商品分类列表
            catelist:[],
            cateProp:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            //动态参数列表数据
            manyTableData:[],
            //静态属性列表数据
            onlyTableData:[],
            //上传图片的URL地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            //图片上传组件的headers请求头对象
            headerObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:''
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        //获取所有商品分类数据
        async getCateList(){
            const {data:res} = await this.$http.get('categories')

            if(res.meta.status!==200){
                return this.$message.error('获取商品分类数据失败')
            }

            this.catelist=res.data
        },
        //级联选择器选中项变化  会触发这个函数
        handleChange(){
            if(this.addForm.goods_cat.length!==3){
                this.addForm.goods_cat=[]
            }
        },
        beforeTabLeave(activeName,oldActiveName){
            if(oldActiveName==='0'&&this.addForm.goods_cat!==3){
                this.$message.error('请先选择商品分类')
                return false
            }
        },
        async tabClicked(){
            if(this.activeIndex==='1'){
                const {data:res} = await this.$http.get(`categoreis/${this.cateId}/attributes`,{params:{sel:'many'}})

                if(res.meta.status!==200){
                    return this.$message.error('获取动态参数列表失败')


                }

                res.data.forEach(item=>{
                    item.attr_vals=
                    item.attr_vals===0?[]:
                    item.attr_vals.split(' ')
                })
                this.mantTableData=res.data
            }else if (this.activeIndex==='2'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
            
                if(res.meta.status!==200){
                    return this.$message.error('获取静态属性失败')
                }

                this.onlyTableData = res.data
            }
        },
        //处理图片预览效果
        handlePreview(){
            this.previewPath=file.response.data.url
            this.previewVisible=true
        },
        //处理移除图片的操作
        handleRemove(file){
            //1.获取将要删除的图片的临时路径
            const filePath=
            file.response.data.tem_path
            //2.从pisc数组中  找到这个图片对应的索引值
            const i = 
            this.addForm.pics.findIndex(x => 
            x.pic===filePath)
            //3.调用数组的splice的方法  把图片信息对象从pics数组中移除
            this.addForm.pics.splice(i,1)
        },
        //监听图片上传成功的事件
        handleSuccess(response){
            //1.拼接得到一个图片信息对象
            const picInfo={pic:response.data.tem_path}
            //2.将图片信息对象  push到 pics数组中
            this.addForm.pics.push(picInfo)
        },
        //添加商品
        add(){
            this.$refs.addFormRef.validate(valid=>{
                if(!valid){
                    return this.$message.error('请填写必要的表单项')
                }
                //执行 添加的业务逻辑
                //lodash cloneDeep(obj)
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                //处理动态参数
                this.manyTableData.forEach(item=>{
                    const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                //处理静态属性
                this.onlyTableData.forEach(item=>{
                    const newInfo ={attr_id:item.attr_id,attr_value:item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs=this.addForm.attrs
                console.log(form);

                //发起请求 添加商品
                //商品的名称  必须是唯一的
                const {data:res} = await this.$http.post('goods',form)
                
                if(res.meta.status!==201){
                    return this.$message.error('商品添加失败')
                }

                this.$message.success('商品添加成功')
                this.$router.push('/goods')
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style lang="less" scoped>

</style>